9705 DESIGN AND TECHNOLOGY

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Edith Marshall
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1 CAMBRIDGE INTERNATIONAL EXAMINATIONS GCE Advanced Level MARK SCHEME for the October/November 2012 series 9705 DESIGN AND TECHNOLOGY 9705/33 Paper 3, maximum raw mark 120 This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners meeting before marking began, which would have considered the acceptability of alternative answers. Mark schemes should be read in conjunction with the question paper and the Principal Examiner Report for Teachers. Cambridge will not enter into discussions about these mark schemes. Cambridge is publishing the mark schemes for the October/November 2012 series for most IGCSE, GCE Advanced Level and Advanced Subsidiary Level components and some Ordinary Level components.

2 Page 2 Mark Scheme Syllabus Paper Section A Part A Product Design 1 (a) description of process fully detailed 3 5 some detail, 0 2 quality of sketches up to 2 7 x 2 [14] (b) vacuum forming range of colours quick process no finishing required drilling and boring Cylindrical material removal accurate single machine operation edged and veneered attractive dimensionally stable reduced weight/cost environmentally friendlier 3 x 2 [6] 2 (a) suitable material including: Aluminium/brass MF, ABS Appropriate hardwood 1 Reasons including: Quality of finish colour/attractive grain/texture Easy to machine Scratch resistant 2 x 1 [3] (b) description to include: quality of description: fully detailed 3 7 some detail, 0 2 quality of sketches up to 2 [9]

3 Page 3 Mark Scheme Syllabus Paper (c) explanation could include: change in process; change in materials; use of jigs, formers, moulds; simplification of design. quality of explanation: logical, structured 4 6 limited detail, 0 3 quality of sketches up to 2 [8] 3 (a) examples could be: grip width/length finger / thumb operation screen clarity ease of opening lid 4 x 3 [12] (b) Discussion could include: cost increased functionality materials size/weight examples / evidence could be Specific materials/components Specific functions examination of issues 3 quality of explanation 3 supporting examples / evidence 2 [8]

4 Page 4 Mark Scheme Syllabus Paper Part B Practical Design 4 (a) (i) SPST, DPDT, micro, tilt name (1 mark) application (1 mark), explanation (up to 3) [4] (ii) thermistor, probe name (1 mark) application (1 mark), explanation (up to 3) [4] (iii) LDR, photoresistor name (1 mark) application (1 mark), explanation (up to 3) [4] (b) applications video, audio, mechanical quality of explanation logical, structured/detailed 4 6 limited detail, 0 3 supporting examples mp3 player, phone, tele-printer up to 2 [8] 5 (a) mortice and tenon (square, sloping haunch other variation) dowel. Name (1 mark) sketch (up to 2 marks) 3 x 2 [6] (b) Cam lock, blocks Name (1 mark) sketch (up to 2 marks) 3 x 2 [6] (c) benefits could be: reduce assembly time reduce costs ease transportation/storage mix and match components examples / evidence could be Specific product Modular (mix and match) opportunities examination of issues 3 quality of explanation 3 supporting examples / evidence 2 [8]

5 Page 5 Mark Scheme Syllabus Paper 6 (a) (i) leaf, skeleton, egg [1] (ii) building, bridge, tower [1] (b) monocoque shell structure, plane fuselage, car body frame pylon, bridge examples (1 mark) 2 x 1 understanding of monocoque and frame 2 comparisons up to 4 [8] (c) (i) description of strut up to 2 description of tie up to 2 [4] (ii) triangulation ties, struts gusset plates quality of explanation logical, structured 4 6 limited detail, 0 3 [6]

6 Page 6 Mark Scheme Syllabus Paper Part C Graphic Products 7 Correct planometric / scale [2] detail walls / positioning [3] table [4] seat [3] arch [5] barbecue [3] 8 (a) materials - high density foam, (can be fabric covered), rubber composites (open cell styrene, butadiene rubber or open cell SBR) with fabric bonded to the upper surface. Accept fabric, recycled rubber tyres, neoprene, silicone rubber, leather, glass, cork, wood, aluminum, stone and stainless steel. (1 mark) Reasons friction for mouse ball, takes print will not scratch table, desk surface ( up to 2 marks) [3] (b) appropriate method, offset lithography, screen, gravure, flexography, transfer quality of description: fully detailed 3 5 some detail, 0 2 quality of sketches up to 2 [7] (c) discussion could include: waste of resources throw away culture/ litter costs must be covered elsewhere examples / evidence could be Specific promotion Specific environmental/issue examination of issues 4 quality of explanation 4 supporting examples / evidence 2 [10]

7 Page 7 Mark Scheme Syllabus Paper 9 (a) correct, working development 4 correct scale 2 tabs 2 accuracy/line quality 2 [10] (b) quality of description: fully detailed 5 8 some detail, 0 4 quality of sketches up to 2 [10]

9705 DESIGN AND TECHNOLOGY

CAMBRIDGE INTERNATIONAL EXAMINATIONS GCE Advanced Level MARK SCHEME for the October/November 2012 series 9705 DESIGN AND TECHNOLOGY 9705/32 Paper 3, maximum raw mark 120 This mark scheme is published as